16 th Annual ICAR Symposium Session C1: DOT/Federal Agency Panelists Aggregate Issues in Oklahoma Kenneth Ray Hobson, P.E. QA Engineer – Materials Division.

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Presentation transcript:

16 th Annual ICAR Symposium Session C1: DOT/Federal Agency Panelists Aggregate Issues in Oklahoma Kenneth Ray Hobson, P.E. QA Engineer – Materials Division May 14, 2008

Outline Materials Division Web Site Materials Division Web Site –5 Step Review of Aggregate Information Aggregate Base Research Aggregate Base Research AIMS Research AIMS Research Micro-Deval Usage Micro-Deval Usage

Materials Division Web Site Navigation for Aggregate Information Step 1: Navigate to the Materials Web Site Step 1: Navigate to the Materials Web Site

s

Materials Division Web Site Navigation for Aggregate Information Step 1: Navigate to the Materials Web Site Step 1: Navigate to the Materials Web Site Step 2: Navigate to Materials & Testing Step 2: Navigate to Materials & Testing

/materials /materials.htm

Materials Division Web Site Navigation for Aggregate Information Step 1: Navigate to the Materials Web Site Step 1: Navigate to the Materials Web Site Step 2: Navigate to Materials & Testing Step 2: Navigate to Materials & Testing Step 3: View Approved Aggregate Materials Step 3: View Approved Aggregate Materials

APL

ALL

Materials Division Web Site Navigation for Aggregate Information Step 1: Navigate to the Materials Web Site Step 1: Navigate to the Materials Web Site Step 2: Navigate to Materials & Testing Step 2: Navigate to Materials & Testing Step 3: View Approved Aggregate Materials Step 3: View Approved Aggregate Materials Step 4: View Aggregate Test Data Step 4: View Aggregate Test Data

Test Data

Coarse Aggregate

Coarse Agg. Data

Materials Division Web Site Navigation for Aggregate Information Step 1: Navigate to the Materials Web Site Step 1: Navigate to the Materials Web Site Step 2: Navigate to Materials & Testing Step 2: Navigate to Materials & Testing Step 3: View Approved Aggregate Materials Step 3: View Approved Aggregate Materials Step 4: View Aggregate Test Data Step 4: View Aggregate Test Data Step 5: Aggregate Specifications Step 5: Aggregate Specifications

Bases

303

Materials

703

Aggregate Base Research Team with ODOT, Contractors and Academia (OTI) Team with ODOT, Contractors and Academia (OTI) Design New Gradation Design New Gradation –Require High Permeability –Producible Field Test Project Field Test Project –Control Sections –Geotextiles –Various Gradations (new and existing) –Test at Various Stages Constructed at the University of Oklahoma Constructed at the University of Oklahoma

AIMS Research Researchers at the University of Oklahoma Researchers at the University of Oklahoma –Dr. Zaman, Dr. Laguros and Ashish Gupta Coarse Aggregate Coarse Aggregate –Quantify: 3-d Shape, Angularity and Texture –Sizes mm Fine Aggregate Fine Aggregate –Quantify: 3-d Shape and Angularity –Sizes 4.75 – 0.15 mm

Micro-Deval Usage Adopted in 2003 by Special Provision for HMA Adopted in 2003 by Special Provision for HMA –Max Loss of 25 for 30 Million ESALs Paper and Field Performance Reviewed to set Specification Paper and Field Performance Reviewed to set Specification –In-House Research Varied Temperature, Loading and Gradation Change is not Easily Accepted Change is not Easily Accepted AASHTO Standard to be Revised AASHTO Standard to be Revised

Thank you!